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<title>Problem 2474. -- 订单 -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>2474: 订单</h2><span class=green>Time Limit: </span>15 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>256 MB<br><span class=green>Submit: </span>62&nbsp;&nbsp;<span class=green>Solved: </span>23<br>[<a href='submitpage.php?id=2474'>Submit</a>][<a href='problemstatus.php?id=2474'>Status</a>][<a href='bbs.php?id=2474'>Discuss</a>]</center><h2>Description</h2><div class=content><div style="text-indent: 21pt"><span style="color: black">A</span><span style="color: black">经常会收到很多的定单。定单的内容为在第</span><span style="color: black">a</span><span style="color: black">天到第</span><span style="color: black">b</span><span style="color: black">天</span><span style="color: black">**</span><span style="color: black">团队将要在</span><span style="color: black">A</span><span style="color: black">的公司狂欢（包括第</span><span style="color: black">a</span><span style="color: black">天与第</span><span style="color: black">b</span><span style="color: black">天）。一旦接受了某一个定单，</span><span style="color: black">A</span><span style="color: black">公司就必须在第</span><span style="color: black">a</span><span style="color: black">天到第</span><span style="color: black">b</span><span style="color: black">天为该团队提供娱乐服务，中途不能取消服务。要如何安排才能使得接受的定单最多呢？</span></div>
<div style="text-indent: 21.75pt"><span style="color: black">现在告诉你</span><span style="color: black">A</span><span style="color: black">公司最多能同时服务的的团队数目以及收到的所有定单，求出可以接受的定单的最大值。</span></div></div><h2>Input</h2><div class=content><div style="text-indent: 21.75pt"><span style="color: black">文件的第一行包含一个整数</span><span style="color: black">T</span><span style="color: black">，表示数据组数。</span></div>
<div style="text-indent: 21.75pt"><span style="color: black">对于每组数据，第一行包含两个整数</span><span style="color: black">n</span><span style="color: black">和</span><span style="color: black">m</span><span style="color: black">，分别表示</span><span style="color: black">收到的定单数和公司能同时服务的团队数。接下来</span><span style="color: black">n</span><span style="color: black">行每行包含两个整数</span><span style="color: black">a</span><span style="color: black">和</span><span style="color: black">b</span><span style="color: black">，表示一个定单的内容：某个团队将在第</span><span style="color: black">a</span><span style="color: black">天与第</span><span style="color: black">b</span><span style="color: black">天之间在A</span><span style="color: black">公司进行狂欢。</span></div></div><h2>Output</h2><div class=content><div style="text-indent: 21.75pt"><span style="color: black">对于每组数据输出一行。该行仅包含一个整数，表示最多能接受的定单数。</span></div></div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>2<br />
2 1<br />
1 2<br />
2 3<br />
2 1<br />
1 2<br />
3 4<br />
</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>1<br />
2<br />
[<br />
 </span></div><h2>HINT</h2>
			<div class=content><p><p>对于100%的数据 T&lt;=50，m&lt;=40000，n&lt;=100000，&sum;n&lt;=200000<br /><br />
&nbsp;</p></p></div><h2>Source</h2>
			<div class=content><p><a href='problemset.html?search='></a></p></div><center>[<a href='submitpage.php?id=2474'>Submit</a>][<a href='problemstatus.php?id=2474'>Status</a>][<a href='bbs.php?id=2474'>Discuss</a>]</center>﻿<br>

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